2211111020121 has 8 divisors (see below), whose sum is σ = 2948155093440. Its totient is φ = 1474070480112.

The previous prime is 2211111020117. The next prime is 2211111020179. The reversal of 2211111020121 is 1210201111122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2211111020121 - 2² = 2211111020117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2211111020121.

It is not an unprimeable number, because it can be changed into a prime (2211111060121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1480620 + ... + 2571858.

It is an arithmetic number, because the mean of its divisors is an integer number (368519386680).

Almost surely, 2^{2211111020121} is an apocalyptic number.

It is an amenable number.

2211111020121 is a deficient number, since it is larger than the sum of its proper divisors (737044073319).

2211111020121 is a wasteful number, since it uses less digits than its factorization.

2211111020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766655.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2211111020121 its reverse (1210201111122), we get a palindrome (3421312131243).

The spelling of 2211111020121 in words is "two trillion, two hundred eleven billion, one hundred eleven million, twenty thousand, one hundred twenty-one".